Home / 1,223,642,820.99-1,688,627,335.95-666,725,868.03

Finding the Fourth Proportional to 1,223,642,820.99, 1,688,627,335.95 and 666,725,868.03

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Solution

The fourth proportional to 1,223,642,820.99, 1,688,627,335.95 and 666,725,868.03 is: 920,081,830.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,223,642,820.99 : 1,688,627,335.95 = 666,725,868.03 : x
  2. Step 2: Convert to fraction form
    1,223,642,820.99/1,688,627,335.95 = 666,725,868.03/x
  3. Step 3: Cross multiply
    1,223,642,820.99x = 1,688,627,335.95 × 666,725,868.03
  4. Step 4: Simplify right side
    1,223,642,820.99x = 1,125,851,526,340,450,176
  5. Step 5: Solve for x
    x = 1,125,851,526,340,450,176/1,223,642,820.99
  6. Step 6: Final answer
    x = 920,081,830.28

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.