Home / 287,157,099.40-430,735,649.10-280,779,807.40

Finding the Fourth Proportional to 287,157,099.40, 430,735,649.10 and 280,779,807.40

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Solution

The fourth proportional to 287,157,099.40, 430,735,649.10 and 280,779,807.40 is: 421,169,711.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,157,099.40 : 430,735,649.10 = 280,779,807.40 : x
  2. Step 2: Convert to fraction form
    287,157,099.40/430,735,649.10 = 280,779,807.40/x
  3. Step 3: Cross multiply
    287,157,099.40x = 430,735,649.10 × 280,779,807.40
  4. Step 4: Simplify right side
    287,157,099.40x = 120,941,872,594,611,984
  5. Step 5: Solve for x
    x = 120,941,872,594,611,984/287,157,099.40
  6. Step 6: Final answer
    x = 421,169,711.10

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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.