Home / 288,868,123.16-398,637,807.02-156,709,144.74

Finding the Fourth Proportional to 288,868,123.16, 398,637,807.02 and 156,709,144.74

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Solution

The fourth proportional to 288,868,123.16, 398,637,807.02 and 156,709,144.74 is: 216,258,509.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    288,868,123.16 : 398,637,807.02 = 156,709,144.74 : x
  2. Step 2: Convert to fraction form
    288,868,123.16/398,637,807.02 = 156,709,144.74/x
  3. Step 3: Cross multiply
    288,868,123.16x = 398,637,807.02 × 156,709,144.74
  4. Step 4: Simplify right side
    288,868,123.16x = 62,470,189,799,133,368
  5. Step 5: Solve for x
    x = 62,470,189,799,133,368/288,868,123.16
  6. Step 6: Final answer
    x = 216,258,509.65

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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.