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Finding the Fourth Proportional to 565,312.45, 780,131.18 and 310,663.63

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Solution

The fourth proportional to 565,312.45, 780,131.18 and 310,663.63 is: 428,715.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    565,312.45 : 780,131.18 = 310,663.63 : x
  2. Step 2: Convert to fraction form
    565,312.45/780,131.18 = 310,663.63/x
  3. Step 3: Cross multiply
    565,312.45x = 780,131.18 × 310,663.63
  4. Step 4: Simplify right side
    565,312.45x = 242,358,387,111.18
  5. Step 5: Solve for x
    x = 242,358,387,111.18/565,312.45
  6. Step 6: Final answer
    x = 428,715.82

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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.