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Finding the Fourth Proportional to 565,556.16, 780,482.40 and 310,913.76

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Solution

The fourth proportional to 565,556.16, 780,482.40 and 310,913.76 is: 429,069.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    565,556.16 : 780,482.40 = 310,913.76 : x
  2. Step 2: Convert to fraction form
    565,556.16/780,482.40 = 310,913.76/x
  3. Step 3: Cross multiply
    565,556.16x = 780,482.40 × 310,913.76
  4. Step 4: Simplify right side
    565,556.16x = 242,662,717,597.82
  5. Step 5: Solve for x
    x = 242,662,717,597.82/565,556.16
  6. Step 6: Final answer
    x = 429,069.18

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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.