Home / 287,156,831.40-430,735,247.10-280,779,539.40

Finding the Fourth Proportional to 287,156,831.40, 430,735,247.10 and 280,779,539.40

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Solution

The fourth proportional to 287,156,831.40, 430,735,247.10 and 280,779,539.40 is: 421,169,309.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,156,831.40 : 430,735,247.10 = 280,779,539.40 : x
  2. Step 2: Convert to fraction form
    287,156,831.40/430,735,247.10 = 280,779,539.40/x
  3. Step 3: Cross multiply
    287,156,831.40x = 430,735,247.10 × 280,779,539.40
  4. Step 4: Simplify right side
    287,156,831.40x = 120,941,644,284,083,184
  5. Step 5: Solve for x
    x = 120,941,644,284,083,184/287,156,831.40
  6. Step 6: Final answer
    x = 421,169,309.10

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.