Home / 288,992,721.78-398,812,875.75-156,834,859.64

Finding the Fourth Proportional to 288,992,721.78, 398,812,875.75 and 156,834,859.64

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Solution

The fourth proportional to 288,992,721.78, 398,812,875.75 and 156,834,859.64 is: 216,433,690.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    288,992,721.78 : 398,812,875.75 = 156,834,859.64 : x
  2. Step 2: Convert to fraction form
    288,992,721.78/398,812,875.75 = 156,834,859.64/x
  3. Step 3: Cross multiply
    288,992,721.78x = 398,812,875.75 × 156,834,859.64
  4. Step 4: Simplify right side
    288,992,721.78x = 62,547,761,388,881,944
  5. Step 5: Solve for x
    x = 62,547,761,388,881,944/288,992,721.78
  6. Step 6: Final answer
    x = 216,433,690.80

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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.