Home / 385,543.16-578,312.90-257,188.12

Finding the Fourth Proportional to 385,543.16, 578,312.90 and 257,188.12

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Solution

The fourth proportional to 385,543.16, 578,312.90 and 257,188.12 is: 385,780.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,543.16 : 578,312.90 = 257,188.12 : x
  2. Step 2: Convert to fraction form
    385,543.16/578,312.90 = 257,188.12/x
  3. Step 3: Cross multiply
    385,543.16x = 578,312.90 × 257,188.12
  4. Step 4: Simplify right side
    385,543.16x = 148,735,207,522.75
  5. Step 5: Solve for x
    x = 148,735,207,522.75/385,543.16
  6. Step 6: Final answer
    x = 385,780.95

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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.