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Finding the Fourth Proportional to 570,492.76, 787,280 and 315,860.34

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Solution

The fourth proportional to 570,492.76, 787,280 and 315,860.34 is: 435,887.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    570,492.76 : 787,280 = 315,860.34 : x
  2. Step 2: Convert to fraction form
    570,492.76/787,280 = 315,860.34/x
  3. Step 3: Cross multiply
    570,492.76x = 787,280 × 315,860.34
  4. Step 4: Simplify right side
    570,492.76x = 248,670,528,475.20
  5. Step 5: Solve for x
    x = 248,670,528,475.20/570,492.76
  6. Step 6: Final answer
    x = 435,887.26

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1.5x scale

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.