Home / 780,965,929.40-1,077,730,025.12-428,547,816.52

Finding the Fourth Proportional to 780,965,929.40, 1,077,730,025.12 and 428,547,816.52

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Solution

The fourth proportional to 780,965,929.40, 1,077,730,025.12 and 428,547,816.52 is: 591,394,363.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    780,965,929.40 : 1,077,730,025.12 = 428,547,816.52 : x
  2. Step 2: Convert to fraction form
    780,965,929.40/1,077,730,025.12 = 428,547,816.52/x
  3. Step 3: Cross multiply
    780,965,929.40x = 1,077,730,025.12 × 428,547,816.52
  4. Step 4: Simplify right side
    780,965,929.40x = 461,858,849,063,220,672
  5. Step 5: Solve for x
    x = 461,858,849,063,220,672/780,965,929.40
  6. Step 6: Final answer
    x = 591,394,363.92

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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.