Home / 1,223,642,824.49-1,688,627,340.78-666,725,871.53

Finding the Fourth Proportional to 1,223,642,824.49, 1,688,627,340.78 and 666,725,871.53

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Solution

The fourth proportional to 1,223,642,824.49, 1,688,627,340.78 and 666,725,871.53 is: 920,081,835.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,223,642,824.49 : 1,688,627,340.78 = 666,725,871.53 : x
  2. Step 2: Convert to fraction form
    1,223,642,824.49/1,688,627,340.78 = 666,725,871.53/x
  3. Step 3: Cross multiply
    1,223,642,824.49x = 1,688,627,340.78 × 666,725,871.53
  4. Step 4: Simplify right side
    1,223,642,824.49x = 1,125,851,535,470,931,712
  5. Step 5: Solve for x
    x = 1,125,851,535,470,931,712/1,223,642,824.49
  6. Step 6: Final answer
    x = 920,081,835.11

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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.