Finding the Fourth Proportional to 578,440,935.60, 798,492,873.75 and 390,523,782.05
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Solution
The fourth proportional to 578,440,935.60, 798,492,873.75 and 390,523,782.05 is: 539,087,809.67
Step by Step Solution
- Step 1: Write the proportion equation
578,440,935.60 : 798,492,873.75 = 390,523,782.05 : x - Step 2: Convert to fraction form
578,440,935.60/798,492,873.75 = 390,523,782.05/x - Step 3: Cross multiply
578,440,935.60x = 798,492,873.75 × 390,523,782.05 - Step 4: Simplify right side
578,440,935.60x = 311,830,456,997,989,504 - Step 5: Solve for x
x = 311,830,456,997,989,504/578,440,935.60 - Step 6: Final answer
x = 539,087,809.67
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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.